– session restore should not give you extra memory usage. – in the past Firebug shut down the fast javascipt engine of Firefox 3.5 I don’t know if that is still the case. If you want to use extensions with that one you have to use this configuration:

You can try this by using a test version. The next Firefox 3.6 version will get separate flash so you can see the memory usage and it won’t freeze your Firefox. – huge memory usage is probably because of flash. A defective harddrive and file fragmentation could be other problems. – slow startup can be many things but I would start with portable apps to see if a fresh Firefox could solve it. – sometimes your profile interacts in a weird way which you can try by creating a new profile or by using portable apps which gives you a totally separate Firefox and profile. I don’t know how much time you are willing to spend on your problems but these ‘solutions’ popped in to my mind:

I use a lot of extensions for all browsers so maybe this is the problem I have firebug, web developer, collorzilla, colored tabs, Meassure it and XMarks but even if I remove all of them the speed is not so much improved.Īlright that’s something valuable to read and react to. – I use Safari just for 1 special site which is rendered best on safari – with chrome it starts very fast it has good plugins some of them are great and they are not available on firefox which is lets say strange for me. – I really like firefox because it is free software and I hope that Firefox 4 will be something different but If I was the “owner” of firefox I definitely will rewrite it from scratch with lighter version of gecko engine without XUL and etc. – when I use it for… 3 days without shutting down which is normal it cannot stop and if I see the memory usage it is 500mb+ sometimes even 750mb+ sometimes when I try to close it it takes 50% of my CPU and it cannot stop the memory just goes up goes up … (maybe saving some sessions dont know) Anyway I dont like it for daily usage. – it starts REALLY SLOW on my XP machine dont know why. Haha sorry dude ok I dont want to say that firefox is something BAD or something like this I really like firefox and firefox is my primary browser for development because of firebug but it has a lot of problems.

Firebug download for firefox 30